<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_File_Transfer
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: Abstract.php 24593 2012-01-05 20:35:02Z matthew $
 */

/**
 * Abstract class for file transfers (Downloads and Uploads)
 *
 * @category  Zend
 * @package   Zend_File_Transfer
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_File_Transfer_Adapter_Abstract {
	/*	 * @+
	 * Plugin loader Constants
	 */

	const FILTER = 'FILTER';
	const VALIDATE = 'VALIDATE';

	/*	 * @- */

	/**
	 * Internal list of breaks
	 *
	 * @var array
	 */
	protected $_break = array();

	/**
	 * Internal list of filters
	 *
	 * @var array
	 */
	protected $_filters = array();

	/**
	 * Plugin loaders for filter and validation chains
	 *
	 * @var array
	 */
	protected $_loaders = array();

	/**
	 * Internal list of messages
	 *
	 * @var array
	 */
	protected $_messages = array();

	/**
	 * @var Zend_Translate
	 */
	protected $_translator;

	/**
	 * Is translation disabled?
	 *
	 * @var bool
	 */
	protected $_translatorDisabled = false;

	/**
	 * Internal list of validators
	 * @var array
	 */
	protected $_validators = array();

	/**
	 * Internal list of files
	 * This array looks like this:
	 *     array(form => array( - Form is the name within the form or, if not set the filename
	 *         name,            - Original name of this file
	 *         type,            - Mime type of this file
	 *         size,            - Filesize in bytes
	 *         tmp_name,        - Internalally temporary filename for uploaded files
	 *         error,           - Error which has occured
	 *         destination,     - New destination for this file
	 *         validators,      - Set validator names for this file
	 *         files            - Set file names for this file
	 *     ))
	 *
	 * @var array
	 */
	protected $_files = array();

	/**
	 * TMP directory
	 * @var string
	 */
	protected $_tmpDir;

	/**
	 * Available options for file transfers
	 */
	protected $_options = array(
		'ignoreNoFile' => false,
		'useByteString' => true,
		'magicFile' => null,
		'detectInfos' => true,
	);

	/**
	 * Send file
	 *
	 * @param  mixed $options
	 * @return bool
	 */
	abstract public function send($options = null);

	/**
	 * Receive file
	 *
	 * @param  mixed $options
	 * @return bool
	 */
	abstract public function receive($options = null);

	/**
	 * Is file sent?
	 *
	 * @param  array|string|null $files
	 * @return bool
	 */
	abstract public function isSent($files = null);

	/**
	 * Is file received?
	 *
	 * @param  array|string|null $files
	 * @return bool
	 */
	abstract public function isReceived($files = null);

	/**
	 * Has a file been uploaded ?
	 *
	 * @param  array|string|null $files
	 * @return bool
	 */
	abstract public function isUploaded($files = null);

	/**
	 * Has the file been filtered ?
	 *
	 * @param array|string|null $files
	 * @return bool
	 */
	abstract public function isFiltered($files = null);

	/**
	 * Retrieve progress of transfer
	 *
	 * @return float
	 */
	public static function getProgress() {
		require_once 'Zend/File/Transfer/Exception.php';
		throw new Zend_File_Transfer_Exception('Method must be implemented within the adapter');
	}

	/**
	 * Set plugin loader to use for validator or filter chain
	 *
	 * @param  Zend_Loader_PluginLoader_Interface $loader
	 * @param  string $type 'filter', or 'validate'
	 * @return Zend_File_Transfer_Adapter_Abstract
	 * @throws Zend_File_Transfer_Exception on invalid type
	 */
	public function setPluginLoader(Zend_Loader_PluginLoader_Interface $loader, $type) {
		$type = strtoupper($type);
		switch ($type) {
			case self::FILTER:
			case self::VALIDATE:
				$this->_loaders[$type] = $loader;
				return $this;
			default:
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception(sprintf('Invalid type "%s" provided to setPluginLoader()', $type));
		}
	}

	/**
	 * Retrieve plugin loader for validator or filter chain
	 *
	 * Instantiates with default rules if none available for that type. Use
	 * 'filter' or 'validate' for $type.
	 *
	 * @param  string $type
	 * @return Zend_Loader_PluginLoader
	 * @throws Zend_File_Transfer_Exception on invalid type.
	 */
	public function getPluginLoader($type) {
		$type = strtoupper($type);
		switch ($type) {
			case self::FILTER:
			case self::VALIDATE:
				$prefixSegment = ucfirst(strtolower($type));
				$pathSegment = $prefixSegment;
				if (!isset($this->_loaders[$type])) {
					$paths = array(
						'Zend_' . $prefixSegment . '_' => 'Zend/' . $pathSegment . '/',
						'Zend_' . $prefixSegment . '_File' => 'Zend/' . $pathSegment . '/File',
					);

					require_once 'Zend/Loader/PluginLoader.php';
					$this->_loaders[$type] = new Zend_Loader_PluginLoader($paths);
				} else {
					$loader = $this->_loaders[$type];
					$prefix = 'Zend_' . $prefixSegment . '_File_';
					if (!$loader->getPaths($prefix)) {
						$loader->addPrefixPath($prefix, str_replace('_', '/', $prefix));
					}
				}
				return $this->_loaders[$type];
			default:
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception(sprintf('Invalid type "%s" provided to getPluginLoader()', $type));
		}
	}

	/**
	 * Add prefix path for plugin loader
	 *
	 * If no $type specified, assumes it is a base path for both filters and
	 * validators, and sets each according to the following rules:
	 * - filters:    $prefix = $prefix . '_Filter'
	 * - validators: $prefix = $prefix . '_Validate'
	 *
	 * Otherwise, the path prefix is set on the appropriate plugin loader.
	 *
	 * @param  string $prefix
	 * @param  string $path
	 * @param  string $type
	 * @return Zend_File_Transfer_Adapter_Abstract
	 * @throws Zend_File_Transfer_Exception for invalid type
	 */
	public function addPrefixPath($prefix, $path, $type = null) {
		$type = strtoupper($type);
		switch ($type) {
			case self::FILTER:
			case self::VALIDATE:
				$loader = $this->getPluginLoader($type);
				$loader->addPrefixPath($prefix, $path);
				return $this;
			case null:
				$prefix = rtrim($prefix, '_');
				$path = rtrim($path, DIRECTORY_SEPARATOR);
				foreach (array(self::FILTER, self::VALIDATE) as $type) {
					$cType = ucfirst(strtolower($type));
					$pluginPath = $path . DIRECTORY_SEPARATOR . $cType . DIRECTORY_SEPARATOR;
					$pluginPrefix = $prefix . '_' . $cType;
					$loader = $this->getPluginLoader($type);
					$loader->addPrefixPath($pluginPrefix, $pluginPath);
				}
				return $this;
			default:
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception(sprintf('Invalid type "%s" provided to getPluginLoader()', $type));
		}
	}

	/**
	 * Add many prefix paths at once
	 *
	 * @param  array $spec
	 * @return Zend_File_Transfer_Exception
	 */
	public function addPrefixPaths(array $spec) {
		if (isset($spec['prefix']) && isset($spec['path'])) {
			return $this->addPrefixPath($spec['prefix'], $spec['path']);
		}
		foreach ($spec as $type => $paths) {
			if (is_numeric($type) && is_array($paths)) {
				$type = null;
				if (isset($paths['prefix']) && isset($paths['path'])) {
					if (isset($paths['type'])) {
						$type = $paths['type'];
					}
					$this->addPrefixPath($paths['prefix'], $paths['path'], $type);
				}
			} elseif (!is_numeric($type)) {
				if (!isset($paths['prefix']) || !isset($paths['path'])) {
					foreach ($paths as $prefix => $spec) {
						if (is_array($spec)) {
							foreach ($spec as $path) {
								if (!is_string($path)) {
									continue;
								}
								$this->addPrefixPath($prefix, $path, $type);
							}
						} elseif (is_string($spec)) {
							$this->addPrefixPath($prefix, $spec, $type);
						}
					}
				} else {
					$this->addPrefixPath($paths['prefix'], $paths['path'], $type);
				}
			}
		}
		return $this;
	}

	/**
	 * Adds a new validator for this class
	 *
	 * @param  string|array $validator           Type of validator to add
	 * @param  boolean      $breakChainOnFailure If the validation chain should stop an failure
	 * @param  string|array $options             Options to set for the validator
	 * @param  string|array $files               Files to limit this validator to
	 * @return Zend_File_Transfer_Adapter
	 */
	public function addValidator($validator, $breakChainOnFailure = false, $options = null, $files = null) {
		if ($validator instanceof Zend_Validate_Interface) {
			$name = get_class($validator);
		} elseif (is_string($validator)) {
			$name = $this->getPluginLoader(self::VALIDATE)->load($validator);
			$validator = new $name($options);
			if (is_array($options) && isset($options['messages'])) {
				if (is_array($options['messages'])) {
					$validator->setMessages($options['messages']);
				} elseif (is_string($options['messages'])) {
					$validator->setMessage($options['messages']);
				}

				unset($options['messages']);
			}
		} else {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('Invalid validator provided to addValidator; must be string or Zend_Validate_Interface');
		}

		$this->_validators[$name] = $validator;
		$this->_break[$name] = $breakChainOnFailure;
		$files = $this->_getFiles($files, true, true);
		foreach ($files as $file) {
			if ($name == 'NotEmpty') {
				$temp = $this->_files[$file]['validators'];
				$this->_files[$file]['validators'] = array($name);
				$this->_files[$file]['validators'] += $temp;
			} else {
				$this->_files[$file]['validators'][] = $name;
			}

			$this->_files[$file]['validated'] = false;
		}

		return $this;
	}

	/**
	 * Add Multiple validators at once
	 *
	 * @param  array $validators
	 * @param  string|array $files
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function addValidators(array $validators, $files = null) {
		foreach ($validators as $name => $validatorInfo) {
			if ($validatorInfo instanceof Zend_Validate_Interface) {
				$this->addValidator($validatorInfo, null, null, $files);
			} else if (is_string($validatorInfo)) {
				if (!is_int($name)) {
					$this->addValidator($name, null, $validatorInfo, $files);
				} else {
					$this->addValidator($validatorInfo, null, null, $files);
				}
			} else if (is_array($validatorInfo)) {
				$argc = count($validatorInfo);
				$breakChainOnFailure = false;
				$options = array();
				if (isset($validatorInfo['validator'])) {
					$validator = $validatorInfo['validator'];
					if (isset($validatorInfo['breakChainOnFailure'])) {
						$breakChainOnFailure = $validatorInfo['breakChainOnFailure'];
					}

					if (isset($validatorInfo['options'])) {
						$options = $validatorInfo['options'];
					}

					$this->addValidator($validator, $breakChainOnFailure, $options, $files);
				} else {
					if (is_string($name)) {
						$validator = $name;
						$options = $validatorInfo;
						$this->addValidator($validator, $breakChainOnFailure, $options, $files);
					} else {
						$file = $files;
						switch (true) {
							case (0 == $argc):
								break;
							case (1 <= $argc):
								$validator = array_shift($validatorInfo);
							case (2 <= $argc):
								$breakChainOnFailure = array_shift($validatorInfo);
							case (3 <= $argc):
								$options = array_shift($validatorInfo);
							case (4 <= $argc):
								if (!empty($validatorInfo)) {
									$file = array_shift($validatorInfo);
								}
							default:
								$this->addValidator($validator, $breakChainOnFailure, $options, $file);
								break;
						}
					}
				}
			} else {
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception('Invalid validator passed to addValidators()');
			}
		}

		return $this;
	}

	/**
	 * Sets a validator for the class, erasing all previous set
	 *
	 * @param  string|array $validator Validator to set
	 * @param  string|array $files     Files to limit this validator to
	 * @return Zend_File_Transfer_Adapter
	 */
	public function setValidators(array $validators, $files = null) {
		$this->clearValidators();
		return $this->addValidators($validators, $files);
	}

	/**
	 * Determine if a given validator has already been registered
	 *
	 * @param  string $name
	 * @return bool
	 */
	public function hasValidator($name) {
		return (false !== $this->_getValidatorIdentifier($name));
	}

	/**
	 * Retrieve individual validator
	 *
	 * @param  string $name
	 * @return Zend_Validate_Interface|null
	 */
	public function getValidator($name) {
		if (false === ($identifier = $this->_getValidatorIdentifier($name))) {
			return null;
		}
		return $this->_validators[$identifier];
	}

	/**
	 * Returns all set validators
	 *
	 * @param  string|array $files (Optional) Returns the validator for this files
	 * @return null|array List of set validators
	 */
	public function getValidators($files = null) {
		if ($files == null) {
			return $this->_validators;
		}

		$files = $this->_getFiles($files, true, true);
		$validators = array();
		foreach ($files as $file) {
			if (!empty($this->_files[$file]['validators'])) {
				$validators += $this->_files[$file]['validators'];
			}
		}

		$validators = array_unique($validators);
		$result = array();
		foreach ($validators as $validator) {
			$result[$validator] = $this->_validators[$validator];
		}

		return $result;
	}

	/**
	 * Remove an individual validator
	 *
	 * @param  string $name
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function removeValidator($name) {
		if (false === ($key = $this->_getValidatorIdentifier($name))) {
			return $this;
		}

		unset($this->_validators[$key]);
		foreach (array_keys($this->_files) as $file) {
			if (empty($this->_files[$file]['validators'])) {
				continue;
			}

			$index = array_search($key, $this->_files[$file]['validators']);
			if ($index === false) {
				continue;
			}

			unset($this->_files[$file]['validators'][$index]);
			$this->_files[$file]['validated'] = false;
		}

		return $this;
	}

	/**
	 * Remove all validators
	 *
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function clearValidators() {
		$this->_validators = array();
		foreach (array_keys($this->_files) as $file) {
			$this->_files[$file]['validators'] = array();
			$this->_files[$file]['validated'] = false;
		}

		return $this;
	}

	/**
	 * Sets Options for adapters
	 *
	 * @param array $options Options to set
	 * @param array $files   (Optional) Files to set the options for
	 */
	public function setOptions($options = array(), $files = null) {
		$file = $this->_getFiles($files, false, true);

		if (is_array($options)) {
			if (empty($file)) {
				$this->_options = array_merge($this->_options, $options);
			}

			foreach ($options as $name => $value) {
				foreach ($file as $key => $content) {
					switch ($name) {
						case 'magicFile' :
							$this->_files[$key]['options'][$name] = (string) $value;
							break;

						case 'ignoreNoFile' :
						case 'useByteString' :
						case 'detectInfos' :
							$this->_files[$key]['options'][$name] = (boolean) $value;
							break;

						default:
							require_once 'Zend/File/Transfer/Exception.php';
							throw new Zend_File_Transfer_Exception("Unknown option: $name = $value");
					}
				}
			}
		}

		return $this;
	}

	/**
	 * Returns set options for adapters or files
	 *
	 * @param  array $files (Optional) Files to return the options for
	 * @return array Options for given files
	 */
	public function getOptions($files = null) {
		$file = $this->_getFiles($files, false, true);

		foreach ($file as $key => $content) {
			if (isset($this->_files[$key]['options'])) {
				$options[$key] = $this->_files[$key]['options'];
			} else {
				$options[$key] = array();
			}
		}

		return $options;
	}

	/**
	 * Checks if the files are valid
	 *
	 * @param  string|array $files (Optional) Files to check
	 * @return boolean True if all checks are valid
	 */
	public function isValid($files = null) {
		$check = $this->_getFiles($files, false, true);
		if (empty($check)) {
			return false;
		}

		$translator = $this->getTranslator();
		$this->_messages = array();
		$break = false;
		foreach ($check as $key => $content) {
			if (array_key_exists('validators', $content) &&
					in_array('Zend_Validate_File_Count', $content['validators'])) {
				$validator = $this->_validators['Zend_Validate_File_Count'];
				$count = $content;
				if (empty($content['tmp_name'])) {
					continue;
				}

				if (array_key_exists('destination', $content)) {
					$checkit = $content['destination'];
				} else {
					$checkit = dirname($content['tmp_name']);
				}

				$checkit .= DIRECTORY_SEPARATOR . $content['name'];
				$validator->addFile($checkit);
			}
		}

		if (isset($count)) {
			if (!$validator->isValid($count['tmp_name'], $count)) {
				$this->_messages += $validator->getMessages();
			}
		}

		foreach ($check as $key => $content) {
			$fileerrors = array();
			if (array_key_exists('validators', $content) && $content['validated']) {
				continue;
			}

			if (array_key_exists('validators', $content)) {
				foreach ($content['validators'] as $class) {
					$validator = $this->_validators[$class];
					if (method_exists($validator, 'setTranslator')) {
						$validator->setTranslator($translator);
					}

					if (($class === 'Zend_Validate_File_Upload') and (empty($content['tmp_name']))) {
						$tocheck = $key;
					} else {
						$tocheck = $content['tmp_name'];
					}

					if (!$validator->isValid($tocheck, $content)) {
						$fileerrors += $validator->getMessages();
					}

					if (!empty($content['options']['ignoreNoFile']) and (isset($fileerrors['fileUploadErrorNoFile']))) {
						unset($fileerrors['fileUploadErrorNoFile']);
						break;
					}

					if (($class === 'Zend_Validate_File_Upload') and (count($fileerrors) > 0)) {
						break;
					}

					if (($this->_break[$class]) and (count($fileerrors) > 0)) {
						$break = true;
						break;
					}
				}
			}

			if (count($fileerrors) > 0) {
				$this->_files[$key]['validated'] = false;
			} else {
				$this->_files[$key]['validated'] = true;
			}

			$this->_messages += $fileerrors;
			if ($break) {
				break;
			}
		}

		if (count($this->_messages) > 0) {
			return false;
		}

		return true;
	}

	/**
	 * Returns found validation messages
	 *
	 * @return array
	 */
	public function getMessages() {
		return $this->_messages;
	}

	/**
	 * Retrieve error codes
	 *
	 * @return array
	 */
	public function getErrors() {
		return array_keys($this->_messages);
	}

	/**
	 * Are there errors registered?
	 *
	 * @return boolean
	 */
	public function hasErrors() {
		return (!empty($this->_messages));
	}

	/**
	 * Adds a new filter for this class
	 *
	 * @param  string|array $filter Type of filter to add
	 * @param  string|array $options   Options to set for the filter
	 * @param  string|array $files     Files to limit this filter to
	 * @return Zend_File_Transfer_Adapter
	 */
	public function addFilter($filter, $options = null, $files = null) {
		if ($filter instanceof Zend_Filter_Interface) {
			$class = get_class($filter);
		} elseif (is_string($filter)) {
			$class = $this->getPluginLoader(self::FILTER)->load($filter);
			$filter = new $class($options);
		} else {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('Invalid filter specified');
		}

		$this->_filters[$class] = $filter;
		$files = $this->_getFiles($files, true, true);
		foreach ($files as $file) {
			$this->_files[$file]['filters'][] = $class;
		}

		return $this;
	}

	/**
	 * Add Multiple filters at once
	 *
	 * @param  array $filters
	 * @param  string|array $files
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function addFilters(array $filters, $files = null) {
		foreach ($filters as $key => $spec) {
			if ($spec instanceof Zend_Filter_Interface) {
				$this->addFilter($spec, null, $files);
				continue;
			}

			if (is_string($key)) {
				$this->addFilter($key, $spec, $files);
				continue;
			}

			if (is_int($key)) {
				if (is_string($spec)) {
					$this->addFilter($spec, null, $files);
					continue;
				}

				if (is_array($spec)) {
					if (!array_key_exists('filter', $spec)) {
						continue;
					}

					$filter = $spec['filter'];
					unset($spec['filter']);
					$this->addFilter($filter, $spec, $files);
					continue;
				}

				continue;
			}
		}

		return $this;
	}

	/**
	 * Sets a filter for the class, erasing all previous set
	 *
	 * @param  string|array $filter Filter to set
	 * @param  string|array $files     Files to limit this filter to
	 * @return Zend_File_Transfer_Adapter
	 */
	public function setFilters(array $filters, $files = null) {
		$this->clearFilters();
		return $this->addFilters($filters, $files);
	}

	/**
	 * Determine if a given filter has already been registered
	 *
	 * @param  string $name
	 * @return bool
	 */
	public function hasFilter($name) {
		return (false !== $this->_getFilterIdentifier($name));
	}

	/**
	 * Retrieve individual filter
	 *
	 * @param  string $name
	 * @return Zend_Filter_Interface|null
	 */
	public function getFilter($name) {
		if (false === ($identifier = $this->_getFilterIdentifier($name))) {
			return null;
		}
		return $this->_filters[$identifier];
	}

	/**
	 * Returns all set filters
	 *
	 * @param  string|array $files (Optional) Returns the filter for this files
	 * @return array List of set filters
	 * @throws Zend_File_Transfer_Exception When file not found
	 */
	public function getFilters($files = null) {
		if ($files === null) {
			return $this->_filters;
		}

		$files = $this->_getFiles($files, true, true);
		$filters = array();
		foreach ($files as $file) {
			if (!empty($this->_files[$file]['filters'])) {
				$filters += $this->_files[$file]['filters'];
			}
		}

		$filters = array_unique($filters);
		$result = array();
		foreach ($filters as $filter) {
			$result[] = $this->_filters[$filter];
		}

		return $result;
	}

	/**
	 * Remove an individual filter
	 *
	 * @param  string $name
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function removeFilter($name) {
		if (false === ($key = $this->_getFilterIdentifier($name))) {
			return $this;
		}

		unset($this->_filters[$key]);
		foreach (array_keys($this->_files) as $file) {
			if (empty($this->_files[$file]['filters'])) {
				continue;
			}

			$index = array_search($key, $this->_files[$file]['filters']);
			if ($index === false) {
				continue;
			}

			unset($this->_files[$file]['filters'][$index]);
		}
		return $this;
	}

	/**
	 * Remove all filters
	 *
	 * @return Zend_File_Transfer_Adapter_Abstract
	 */
	public function clearFilters() {
		$this->_filters = array();
		foreach (array_keys($this->_files) as $file) {
			$this->_files[$file]['filters'] = array();
		}
		return $this;
	}

	/**
	 * Returns all set files
	 *
	 * @return array List of set files
	 * @throws Zend_File_Transfer_Exception Not implemented
	 */
	public function getFile() {
		require_once 'Zend/File/Transfer/Exception.php';
		throw new Zend_File_Transfer_Exception('Method not implemented');
	}

	/**
	 * Retrieves the filename of transferred files.
	 *
	 * @param  string  $fileelement (Optional) Element to return the filename for
	 * @param  boolean $path        (Optional) Should the path also be returned ?
	 * @return string|array
	 */
	public function getFileName($file = null, $path = true) {
		$files = $this->_getFiles($file, true, true);
		$result = array();
		$directory = "";
		foreach ($files as $file) {
			if (empty($this->_files[$file]['name'])) {
				continue;
			}

			if ($path === true) {
				$directory = $this->getDestination($file) . DIRECTORY_SEPARATOR;
			}

			$result[$file] = $directory . $this->_files[$file]['name'];
		}

		if (count($result) == 1) {
			return current($result);
		}

		return $result;
	}

	/**
	 * Retrieve additional internal file informations for files
	 *
	 * @param  string $file (Optional) File to get informations for
	 * @return array
	 */
	public function getFileInfo($file = null) {
		return $this->_getFiles($file);
	}

	/**
	 * Adds one or more files
	 *
	 * @param  string|array $file      File to add
	 * @param  string|array $validator Validators to use for this file, must be set before
	 * @param  string|array $filter    Filters to use for this file, must be set before
	 * @return Zend_File_Transfer_Adapter_Abstract
	 * @throws Zend_File_Transfer_Exception Not implemented
	 */
	public function addFile($file, $validator = null, $filter = null) {
		require_once 'Zend/File/Transfer/Exception.php';
		throw new Zend_File_Transfer_Exception('Method not implemented');
	}

	/**
	 * Returns all set types
	 *
	 * @return array List of set types
	 * @throws Zend_File_Transfer_Exception Not implemented
	 */
	public function getType() {
		require_once 'Zend/File/Transfer/Exception.php';
		throw new Zend_File_Transfer_Exception('Method not implemented');
	}

	/**
	 * Adds one or more type of files
	 *
	 * @param  string|array $type Type of files to add
	 * @param  string|array $validator Validators to use for this file, must be set before
	 * @param  string|array $filter    Filters to use for this file, must be set before
	 * @return Zend_File_Transfer_Adapter_Abstract
	 * @throws Zend_File_Transfer_Exception Not implemented
	 */
	public function addType($type, $validator = null, $filter = null) {
		require_once 'Zend/File/Transfer/Exception.php';
		throw new Zend_File_Transfer_Exception('Method not implemented');
	}

	/**
	 * Sets a new destination for the given files
	 *
	 * @deprecated Will be changed to be a filter!!!
	 * @param  string       $destination New destination directory
	 * @param  string|array $files       Files to set the new destination for
	 * @return Zend_File_Transfer_Abstract
	 * @throws Zend_File_Transfer_Exception when the given destination is not a directory or does not exist
	 */
	public function setDestination($destination, $files = null) {
		$orig = $files;
		$destination = rtrim($destination, "/\\");
		if (!is_dir($destination)) {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('The given destination is not a directory or does not exist');
		}

		if (!is_writable($destination)) {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('The given destination is not writeable');
		}

		if ($files === null) {
			foreach ($this->_files as $file => $content) {
				$this->_files[$file]['destination'] = $destination;
			}
		} else {
			$files = $this->_getFiles($files, true, true);
			if (empty($files) and is_string($orig)) {
				$this->_files[$orig]['destination'] = $destination;
			}

			foreach ($files as $file) {
				$this->_files[$file]['destination'] = $destination;
			}
		}

		return $this;
	}

	/**
	 * Retrieve destination directory value
	 *
	 * @param  null|string|array $files
	 * @return null|string|array
	 */
	public function getDestination($files = null) {
		$orig = $files;
		$files = $this->_getFiles($files, false, true);
		$destinations = array();
		if (empty($files) and is_string($orig)) {
			if (isset($this->_files[$orig]['destination'])) {
				$destinations[$orig] = $this->_files[$orig]['destination'];
			} else {
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception(sprintf('The file transfer adapter can not find "%s"', $orig));
			}
		}

		foreach ($files as $key => $content) {
			if (isset($this->_files[$key]['destination'])) {
				$destinations[$key] = $this->_files[$key]['destination'];
			} else {
				$tmpdir = $this->_getTmpDir();
				$this->setDestination($tmpdir, $key);
				$destinations[$key] = $tmpdir;
			}
		}

		if (empty($destinations)) {
			$destinations = $this->_getTmpDir();
		} else if (count($destinations) == 1) {
			$destinations = current($destinations);
		}

		return $destinations;
	}

	/**
	 * Set translator object for localization
	 *
	 * @param  Zend_Translate|null $translator
	 * @return Zend_File_Transfer_Abstract
	 */
	public function setTranslator($translator = null) {
		if (null === $translator) {
			$this->_translator = null;
		} elseif ($translator instanceof Zend_Translate_Adapter) {
			$this->_translator = $translator;
		} elseif ($translator instanceof Zend_Translate) {
			$this->_translator = $translator->getAdapter();
		} else {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('Invalid translator specified');
		}

		return $this;
	}

	/**
	 * Retrieve localization translator object
	 *
	 * @return Zend_Translate_Adapter|null
	 */
	public function getTranslator() {
		if ($this->translatorIsDisabled()) {
			return null;
		}

		return $this->_translator;
	}

	/**
	 * Indicate whether or not translation should be disabled
	 *
	 * @param  bool $flag
	 * @return Zend_File_Transfer_Abstract
	 */
	public function setDisableTranslator($flag) {
		$this->_translatorDisabled = (bool) $flag;
		return $this;
	}

	/**
	 * Is translation disabled?
	 *
	 * @return bool
	 */
	public function translatorIsDisabled() {
		return $this->_translatorDisabled;
	}

	/**
	 * Returns the hash for a given file
	 *
	 * @param  string       $hash  Hash algorithm to use
	 * @param  string|array $files Files to return the hash for
	 * @return string|array Hashstring
	 * @throws Zend_File_Transfer_Exception On unknown hash algorithm
	 */
	public function getHash($hash = 'crc32', $files = null) {
		if (!in_array($hash, hash_algos())) {
			require_once 'Zend/File/Transfer/Exception.php';
			throw new Zend_File_Transfer_Exception('Unknown hash algorithm');
		}

		$files = $this->_getFiles($files);
		$result = array();
		foreach ($files as $key => $value) {
			if (file_exists($value['name'])) {
				$result[$key] = hash_file($hash, $value['name']);
			} else if (file_exists($value['tmp_name'])) {
				$result[$key] = hash_file($hash, $value['tmp_name']);
			} else if (empty($value['options']['ignoreNoFile'])) {
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception("The file '{$value['name']}' does not exist");
			}
		}

		if (count($result) == 1) {
			return current($result);
		}

		return $result;
	}

	/**
	 * Returns the real filesize of the file
	 *
	 * @param string|array $files Files to get the filesize from
	 * @throws Zend_File_Transfer_Exception When the file does not exist
	 * @return string|array Filesize
	 */
	public function getFileSize($files = null) {
		$files = $this->_getFiles($files);
		$result = array();
		foreach ($files as $key => $value) {
			if (file_exists($value['name']) || file_exists($value['tmp_name'])) {
				if ($value['options']['useByteString']) {
					$result[$key] = self::_toByteString($value['size']);
				} else {
					$result[$key] = $value['size'];
				}
			} else if (empty($value['options']['ignoreNoFile'])) {
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception("The file '{$value['name']}' does not exist");
			} else {
				continue;
			}
		}

		if (count($result) == 1) {
			return current($result);
		}

		return $result;
	}

	/**
	 * Internal method to detect the size of a file
	 *
	 * @param  array $value File infos
	 * @return string Filesize of given file
	 */
	protected function _detectFileSize($value) {
		if (file_exists($value['name'])) {
			$result = sprintf("%u", @filesize($value['name']));
		} else if (file_exists($value['tmp_name'])) {
			$result = sprintf("%u", @filesize($value['tmp_name']));
		} else {
			return null;
		}

		return $result;
	}

	/**
	 * Returns the real mimetype of the file
	 * Uses fileinfo, when not available mime_magic and as last fallback a manual given mimetype
	 *
	 * @param string|array $files Files to get the mimetype from
	 * @throws Zend_File_Transfer_Exception When the file does not exist
	 * @return string|array MimeType
	 */
	public function getMimeType($files = null) {
		$files = $this->_getFiles($files);
		$result = array();
		foreach ($files as $key => $value) {
			if (file_exists($value['name']) || file_exists($value['tmp_name'])) {
				$result[$key] = $value['type'];
			} else if (empty($value['options']['ignoreNoFile'])) {
				require_once 'Zend/File/Transfer/Exception.php';
				throw new Zend_File_Transfer_Exception("The file '{$value['name']}' does not exist");
			} else {
				continue;
			}
		}

		if (count($result) == 1) {
			return current($result);
		}

		return $result;
	}

	/**
	 * Internal method to detect the mime type of a file
	 *
	 * @param  array $value File infos
	 * @return string Mimetype of given file
	 */
	protected function _detectMimeType($value) {
		if (file_exists($value['name'])) {
			$file = $value['name'];
		} else if (file_exists($value['tmp_name'])) {
			$file = $value['tmp_name'];
		} else {
			return null;
		}

		if (class_exists('finfo', false)) {
			$const = defined('FILEINFO_MIME_TYPE') ? FILEINFO_MIME_TYPE : FILEINFO_MIME;
			if (!empty($value['options']['magicFile'])) {
				$mime = @finfo_open($const, $value['options']['magicFile']);
			}

			if (empty($mime)) {
				$mime = @finfo_open($const);
			}

			if (!empty($mime)) {
				$result = finfo_file($mime, $file);
			}

			unset($mime);
		}

		if (empty($result) && (function_exists('mime_content_type')
				&& ini_get('mime_magic.magicfile'))) {
			$result = mime_content_type($file);
		}

		if (empty($result)) {
			$result = 'application/octet-stream';
		}

		return $result;
	}

	/**
	 * Returns the formatted size
	 *
	 * @param  integer $size
	 * @return string
	 */
	protected static function _toByteString($size) {
		$sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
		for ($i = 0; $size >= 1024 && $i < 9; $i++) {
			$size /= 1024;
		}

		return round($size, 2) . $sizes[$i];
	}

	/**
	 * Internal function to filter all given files
	 *
	 * @param  string|array $files (Optional) Files to check
	 * @return boolean False on error
	 */
	protected function _filter($files = null) {
		$check = $this->_getFiles($files);
		foreach ($check as $name => $content) {
			if (array_key_exists('filters', $content)) {
				foreach ($content['filters'] as $class) {
					$filter = $this->_filters[$class];
					try {
						$result = $filter->filter($this->getFileName($name));

						$this->_files[$name]['destination'] = dirname($result);
						$this->_files[$name]['name'] = basename($result);
					} catch (Zend_Filter_Exception $e) {
						$this->_messages += array($e->getMessage());
					}
				}
			}
		}

		if (count($this->_messages) > 0) {
			return false;
		}

		return true;
	}

	/**
	 * Determine system TMP directory and detect if we have read access
	 *
	 * @return string
	 * @throws Zend_File_Transfer_Exception if unable to determine directory
	 */
	protected function _getTmpDir() {
		if (null === $this->_tmpDir) {
			$tmpdir = array();
			if (function_exists('sys_get_temp_dir')) {
				$tmpdir[] = sys_get_temp_dir();
			}

			if (!empty($_ENV['TMP'])) {
				$tmpdir[] = realpath($_ENV['TMP']);
			}

			if (!empty($_ENV['TMPDIR'])) {
				$tmpdir[] = realpath($_ENV['TMPDIR']);
			}

			if (!empty($_ENV['TEMP'])) {
				$tmpdir[] = realpath($_ENV['TEMP']);
			}

			$upload = ini_get('upload_tmp_dir');
			if ($upload) {
				$tmpdir[] = realpath($upload);
			}

			foreach ($tmpdir as $directory) {
				if ($this->_isPathWriteable($directory)) {
					$this->_tmpDir = $directory;
				}
			}

			if (empty($this->_tmpDir)) {
				// Attemp to detect by creating a temporary file
				$tempFile = tempnam(md5(uniqid(rand(), TRUE)), '');
				if ($tempFile) {
					$this->_tmpDir = realpath(dirname($tempFile));
					unlink($tempFile);
				} else {
					require_once 'Zend/File/Transfer/Exception.php';
					throw new Zend_File_Transfer_Exception('Could not determine a temporary directory');
				}
			}

			$this->_tmpDir = rtrim($this->_tmpDir, "/\\");
		}
		return $this->_tmpDir;
	}

	/**
	 * Tries to detect if we can read and write to the given path
	 *
	 * @param string $path
	 */
	protected function _isPathWriteable($path) {
		$tempFile = rtrim($path, "/\\");
		$tempFile .= '/' . 'test.1';

		$result = @file_put_contents($tempFile, 'TEST');

		if ($result == false) {
			return false;
		}

		$result = @unlink($tempFile);

		if ($result == false) {
			return false;
		}

		return true;
	}

	/**
	 * Returns found files based on internal file array and given files
	 *
	 * @param  string|array $files       (Optional) Files to return
	 * @param  boolean      $names       (Optional) Returns only names on true, else complete info
	 * @param  boolean      $noexception (Optional) Allows throwing an exception, otherwise returns an empty array
	 * @return array Found files
	 * @throws Zend_File_Transfer_Exception On false filename
	 */
	protected function _getFiles($files, $names = false, $noexception = false) {
		$check = array();

		if (is_string($files)) {
			$files = array($files);
		}

		if (is_array($files)) {
			foreach ($files as $find) {
				$found = array();
				foreach ($this->_files as $file => $content) {
					if (!isset($content['name'])) {
						continue;
					}

					if (($content['name'] === $find) && isset($content['multifiles'])) {
						foreach ($content['multifiles'] as $multifile) {
							$found[] = $multifile;
						}
						break;
					}

					if ($file === $find) {
						$found[] = $file;
						break;
					}

					if ($content['name'] === $find) {
						$found[] = $file;
						break;
					}
				}

				if (empty($found)) {
					if ($noexception !== false) {
						return array();
					}

					require_once 'Zend/File/Transfer/Exception.php';
					throw new Zend_File_Transfer_Exception(sprintf('The file transfer adapter can not find "%s"', $find));
				}

				foreach ($found as $checked) {
					$check[$checked] = $this->_files[$checked];
				}
			}
		}

		if ($files === null) {
			$check = $this->_files;
			$keys = array_keys($check);
			foreach ($keys as $key) {
				if (isset($check[$key]['multifiles'])) {
					unset($check[$key]);
				}
			}
		}

		if ($names) {
			$check = array_keys($check);
		}

		return $check;
	}

	/**
	 * Retrieve internal identifier for a named validator
	 *
	 * @param  string $name
	 * @return string
	 */
	protected function _getValidatorIdentifier($name) {
		if (array_key_exists($name, $this->_validators)) {
			return $name;
		}

		foreach (array_keys($this->_validators) as $test) {
			if (preg_match('/' . preg_quote($name) . '$/i', $test)) {
				return $test;
			}
		}

		return false;
	}

	/**
	 * Retrieve internal identifier for a named filter
	 *
	 * @param  string $name
	 * @return string
	 */
	protected function _getFilterIdentifier($name) {
		if (array_key_exists($name, $this->_filters)) {
			return $name;
		}

		foreach (array_keys($this->_filters) as $test) {
			if (preg_match('/' . preg_quote($name) . '$/i', $test)) {
				return $test;
			}
		}

		return false;
	}

}
